Washer capacity refers to the size of the washer basket or drum, and it is typically measured in cubic feet. A higher capacity means that more clothing or household items can be loaded in a single wash cycle.
Most top-loading washing machines have a capacity of 3.2 to 3.5 cubic feet, according to Warners' Stellian. Most front-loading machines have a larger capacity because they do not include an agitator; the capacity of these machines ranges from 3.1 to 4.7 cubic feet. A machine with a capacity of at least 3.5 cubic feet is necessary to wash a queen-size comforter, and a king-size comforter needs a machine with at least 3.8 cubic feet.